Brazil's central bank is tightening the screws on high-cost household debt, but that isn't stopping Mercado Pago from handing out more credit cards. The fintech arm of MercadoLibre issued 2.6 million cards in the second quarter, up from 1.6 million in the same period last year, according to a Reuters report.
The company says its underwriting model, powered by artificial intelligence, is holding up even as regulators prepare new measures to rein in borrowing. That puts Mercado Pago in a delicate spot: expanding aggressively in a market that policymakers are actively trying to cool.
Why Brazil is worried about household debt
Brazilian households have been leaning heavily on credit cards and unsecured consumer loans, which typically carry very high interest rates. These are the same products where Mercado Pago has been growing fastest. The central bank has signaled it will introduce a new rule aimed at reducing the cost of this kind of borrowing, though details are still emerging.
High-cost debt can become a drag on the broader economy. When households spend a large share of income servicing loans, they have less to spend on goods and services. That can slow growth and raise the risk of defaults, which is why regulators step in.
For Mercado Pago, the challenge is to keep growing without taking on too much risk. The company argues its AI-driven underwriting gives it an edge. It uses thousands of data points, including shopping behavior on MercadoLibre's marketplace, to decide who gets credit and at what terms. That's a different approach from traditional banks, which often rely on credit bureau scores and income documents.
How AI underwriting works
Instead of just looking at a credit score, Mercado Pago's system analyzes patterns like how often a user shops, what they buy, and whether they pay bills on time within the MercadoLibre ecosystem. The idea is that this richer data can predict repayment behavior more accurately, especially for people who have little or no credit history.
This is a common pitch among fintechs in emerging markets, where a large share of the population is underbanked. By using alternative data, they can extend credit to people who might be turned away by traditional lenders. But it also means taking on borrowers with less established credit profiles, which can be riskier during economic downturns.
So far, Mercado Pago says its credit quality remains solid. The company has not reported a spike in delinquencies, and it continues to push more cards into the market. Still, the central bank's upcoming measure could change the economics of that business.
What it means for investors
For investors, the key question is whether Mercado Pago can keep growing its credit portfolio without seeing a rise in defaults. If the central bank's new rule caps interest rates or restricts certain fees, it could squeeze the fintech's profit margins. On the other hand, if AI underwriting truly does a better job of picking creditworthy borrowers, Mercado Pago might weather the regulatory shift better than traditional banks.
Mercado Pago is part of MercadoLibre, which is often seen as a bellwether for e-commerce and fintech in Latin America. Its performance in Brazil, the region's largest economy, is closely watched by investors. The company's ability to balance growth and risk will be a key driver of its stock price in the coming quarters.
Brazil's central bank has been in a tightening cycle, and the new measure on household debt is part of a broader effort to keep the financial system stable. Investors should watch for details of the rule and how it affects not just Mercado Pago, but also other lenders in the country.
For everyday investors, this story is a reminder that high-growth fintechs often operate in regulatory gray zones. When governments step in, it can change the outlook quickly. It's worth keeping an eye on how Mercado Pago adapts.
Related reading: Brazil's Bovespa has been on a winning streak, and credit demand trends elsewhere show how consumer borrowing can shift. Also, AI-driven underwriting is a hot topic in tech, and private credit is expanding globally.


